ND90-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm

Quick Overview

Dayton Audios compact aluminum cone drivers demonstrate the latest advances in high-excursion design processes.

Product Highlights

  • Full-range 80 Hz to 15 kHz performance
  • Rubber-edged aluminum alloy cone
  • Large excursion capability 4 mm Xmax, 20 mm peak
  • Self-shielded Neo-Balanced motor structure
  • 3/4" 4-layer underhung voice coil with polyimide former
  • 20 watts RMS power handling

Product Manuals / Spec Sheets / Downloads

Dayton Audio ND90-4 Specification Sheet
Dayton Audio ND90-4 Klippel Test Results
Dayton Audio ND90-4 Data Files

Dayton Audios compact aluminum cone drivers demonstrate the latest advances in high-excursion design processes. An efficient, low-distortion Neo-Balanced motor is combined with a rigid yet lightweight aluminum diaphragm, yielding impressive high-impact audio reproduction. Perfect for single point-source applications, or combined in multiples and line arrays.


Sealed Volume 0.1 ft.³
Sealed F3 90 Hz
Vented Volume 0.16 ft.³
Vented F3 48 Hz
* Enclosure volume/F3s based on BassBox "optimum" calculations

Speaker Series ND Series
Model Number ND90-4
Color Black
Unit of Measure Each
UPC 844632081064
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.55
Speaker Type Full-Range
Nominal Diameter 3.50"
Power Handling (RMS) 20 watts
Power Handling (max) 40 watts
Continuous Program Power --
Impedance 4 ohms
Sensitivity 85.7 dB @ 2.83V/1m
Frequency Response

80 - 15

000 Hz

Voice Coil Diameter 19 mm
Magnet Weight --
DC Resistance (Re) 3.6 ohms
Voice Coil Inductance (Le) 0.62 mH @ 1 kHz
Resonant Frequency (Fs) 90.2 Hz
Mechanical Q (Qms) 5.1
Electromagnetic Q (Qes) 0.72
Total Q (Qts) 0.63
Diaphragm Mass Inc. Airload (Mms) 4.3g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.73 mm/N
Surface Area Of Cone (Sd) 31.2 cm²
Volume of Displacement (Vd) 12.5 cm³
BL Product (BL) 3.47 Tm
Compliance Equivalent Volume (Vas) 1.06 liters
Maximum Linear Excursion (Xmax) 4.0 mm
Drivers Mechanical Losses (Rms) --
Cone / Diaphragm Material Black Anodized Aluminum Cone
Entry / Exit Diameter --
Surround Material Rubber
Voice Coil Wire Material Copper
Voice Coil Former Kapton® / Polyimide
Basket/Frame Material Steel
Magnet Material Neodymium
Overall Outside Diameter 103.5 mm
Overall Depth 60.8 mm
Baffle Cutout Diameter 85 mm
# Mounting Holes 4
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --